Home-Based Business Tax Deductions: Home Office, Storage, and Vehicle Rules

By Yarik Yarosh, CPA ·September 5, 2026 ·7 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

Running a business from home unlocks deductions that are otherwise non-deductible personal expenses. The home office deduction under IRC 280A allows a business owner to deduct the business-use portion of rent or mortgage interest, property taxes, utilities, insurance, repairs, and depreciation (for homeowners). The deduction requires a space used “regularly and exclusively” for business. The secondary (and often more valuable) benefit of the home office deduction is that it converts commuting from home to any work location into deductible business mileage. Without a home office, driving from home to a job site is commuting (not deductible). With a home office, the home IS the principal place of business, and every drive to a job site is a business trip.

✓Key takeaway

Home office deduction methods:

Simplified method:

$5 per square foot of home office space
Maximum 300 square feet = $1,500 maximum deduction
No depreciation calculation, no need to track home expenses
Mortgage interest and property tax still fully deductible on Schedule A (no allocation)
Best for: small offices, owners who don’t want to track home expenses

Regular (actual expense) method:

Calculate business percentage: office square footage / total home square footage
Apply percentage to ALL home expenses:
- Mortgage interest or rent
- Property taxes
- Utilities (electric, gas, water, internet)
- Homeowner’s/renter’s insurance
- Repairs and maintenance
- HOA fees
- Depreciation (homeowners only, on the structure portion)
Best for: larger offices, expensive homes, owners who track expenses anyway

Exclusive use test:

The space must be used EXCLUSIVELY for business
A spare bedroom that is also a guest room: does NOT qualify
A corner of the living room with no partition: usually does NOT qualify
A dedicated room used only for business: qualifies
A detached garage converted to a workshop: qualifies
Exception: inventory storage in a separate identifiable space (does not require exclusive use)

Regular and exclusive use exceptions:

Daycare facilities: no exclusive use requirement (use a time/space calculation)
Inventory storage: a separate, identifiable space used for storing inventory qualifies even if the space is also used for other purposes
This exception is valuable for e-commerce sellers storing products at home

The vehicle mileage benefit:

Scenario	Home to Job Site	Deductible?
No home office	Commuting	No
Home office (principal place of business)	Business travel	Yes, at 70 cents/mile
Office elsewhere, home office is secondary	Commuting to office; business to job sites	Partial

For a plumber with a home office who drives to 5 job sites per day:

Without home office: first trip (home to Site 1) and last trip (Site 5 to home) are commuting = NOT deductible
With home office: ALL trips are business travel = deductible

Daily mileage example:

Home to Site 1: 12 miles
Site 1 to Site 2: 8 miles
Site 2 to Site 3: 5 miles
Site 3 to Site 4: 10 miles
Site 4 to Site 5: 7 miles
Site 5 to Home: 15 miles
Total: 57 miles/day

Without home office: 57 - 12 - 15 = 30 deductible miles (commute excluded) With home office: 57 deductible miles (all business travel)

Difference: 27 miles/day x 250 days x $0.70 = $4,725/year in additional deductions At 25% marginal rate: $1,181 in tax savings from the home office mileage benefit alone

How much does the home office deduction save?

Hypothetical example

Round numbers. A sole proprietor electrician with a dedicated 200 sq ft home office in a 2,000 sq ft home. Homeowner. Single filer.

Home expenses:

Expense	Annual Amount	Business % (10%)
Mortgage interest	$12,000	$1,200
Property taxes	$4,000	$400
Utilities (electric, gas, water)	$3,600	$360
Internet	$1,200	$120
Homeowner’s insurance	$1,800	$180
Home repairs/maintenance	$2,000	$200
Depreciation (on structure only)	$3,500	$350
Total home expenses	$28,100	$2,810

Simplified method comparison: 200 sq ft x $5 = $1,000

Regular method ($2,810) is $1,810 more than simplified ($1,000).

But wait: the mileage benefit: The electrician drives 45 miles/day to job sites, 250 days/year. Without home office: 30 deductible miles/day (excluding commute) With home office: 45 deductible miles/day

Additional deductible miles: 15/day x 250 = 3,750 miles/year Additional deduction: 3,750 x $0.70 = $2,625

Total home office benefit:

Home expense deduction: $2,810 (regular method)
Additional mileage deduction: $2,625
Total: $5,435

At 25% marginal rate + SE tax: $5,435 x 30% = $1,631 in annual tax savings

The mileage benefit ($2,625) is nearly as large as the home expense deduction ($2,810). Many business owners focus on the home expense deduction and overlook the mileage conversion, which can be the bigger benefit.

Renter vs. homeowner: If the electrician rents at $2,000/month instead of owning:

Expense	Annual Amount	Business % (10%)
Rent	$24,000	$2,400
Utilities	$3,600	$360
Internet	$1,200	$120
Renter’s insurance	$300	$30
Total	$29,100	$2,910

Renter’s deduction ($2,910) is actually HIGHER than the homeowner’s ($2,810) in this example because rent ($24,000/year) is greater than mortgage interest ($12,000). And the renter has NO depreciation recapture concern (see below).

Depreciation recapture (homeowners only): If a homeowner claims the regular method and includes depreciation, they must recapture the depreciation when they sell the home. The home office portion of the home is treated as Section 1250 property, and depreciation taken is recaptured at a 25% rate.

Example: 10 years of $350/year depreciation = $3,500 total depreciation. When the home is sold: $3,500 x 25% = $875 in recapture tax.

The tax savings over 10 years: $3,500 x 30% = $1,050. Net benefit after recapture: $1,050 - $875 = $175 over 10 years.

This makes depreciation the least valuable component of the home office deduction for homeowners. Some CPAs advise homeowners to claim the regular method BUT exclude depreciation to avoid recapture. This is not technically an option (depreciation is “allowed or allowable”), meaning the IRS treats you as if you took the depreciation whether you did or not. The practical workaround: use the simplified method to avoid the depreciation issue entirely, OR accept the modest recapture as the cost of the annual tax savings.

E-commerce home office (inventory storage): An Etsy seller stores inventory in a 150 sq ft spare room and works from a 100 sq ft desk area in the same room.

The inventory storage space qualifies under the storage exception (no exclusive use requirement needed for a separate, identifiable storage space in the taxpayer’s home).

Total qualifying space: 250 sq ft out of 1,800 sq ft home = 13.9% Regular method on $24,000 rent + $4,800 utilities + $1,200 internet + $300 insurance = $30,300 Business portion: $30,300 x 13.9% = $4,212

This is nearly 3x the simplified method ($1,500 max). For home-based e-commerce sellers with dedicated inventory space, the regular method is almost always better.

Illustrative numbers only, not a real client and not advice for your facts.

Related guides:

Can you claim a home office deduction if you also rent office space?

Yes, having a separate office doesn’t automatically disqualify your home office deduction as long as your home office meets the regular and exclusive use test under IRC 280A. The home office must be your principal place of business or a place where you regularly meet clients, even if you also maintain another workspace. Under the Soliman test from the Supreme Court decision, a home office qualifies as your principal place of business if you perform substantial administrative or management activities there and have no other fixed location for those activities. The simplified method allows a $5 per square foot deduction up to 300 square feet ($1,500 maximum), while the regular method requires tracking actual expenses and calculating the business-use percentage of your home.

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Cite this page

Yarik Yarosh, CPA. "Home-Based Business Tax Deductions: Home Office, Storage, and Vehicle Rules." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-home-based-business-tax-deductions

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.